Following the call on the government from Lord Hague to look again at legalising cannabis MPs, Ron Hogg PCC, academics and think tanks write to the Telegraph to call for a Royal Commission to examine the evidence of legalising cannabis.

Dear Sir/Madam,

We believe that Lord Hague is right to say that the war on cannabis has been ‘irreversibly lost’.

The Adam Smith Institute has estimated that legalisation, regulation, and taxation of cannabis would raise at least £1bn a year for the Treasury, while the TaxPayers' Alliance has suggested nearly £900m could be saved from police, prisons, courts and NHS budgets from legalisation. The UK could use a ‘cannabis dividend’ on expanding access to addiction treatment centres and reducing wait-times for mental health services on the NHS.

Ensuring the safety of citizens is the first duty of government. Prohibition of cannabis is failing to keep Britons safe. Pushing people into the hands of gangs that peddle drugs on the black market risks their safety and gives cash to criminals. Users have no way of knowing the potency of the cannabis they consume, which varies wildly depending on where they get it from.

With cannabis legal in some form in a majority of US states, and Canada preparing to fully legalise recreational cannabis, we believe the status quo is unsustainable.

The government should appoint a Royal Commission to look again at how cannabis is treated under the law and consider legalisation.